<template>
    <!-- 收获地址 -->
    <van-contact-card type="edit" :name="`${address.name} ${address.region_text}`" :tel="address.tel" v-if="Object.getOwnPropertyNames(address).length > 0" @click="OnAddressSelect"  />
    <van-contact-card type="add" v-else @click="AddressShow = true"  />

    <!-- 商品卡片 -->
    <van-card
        v-for="(item, key) in CartList"
        :thumb="item.product.thumb_text"
        :num="item.nums"
        @click-thumb="ToProductInfo(item.proid)"
    >
        <template #title>
            <div class="title" @click="ToProductInfo(item.proid)">{{item.product.name}}</div>
        </template>

        <!-- 卡片的插槽部分 -->
        <template #desc v-if="item.attrs">
            <van-tag v-for="(attr,index) in item.attrs" :key="index" class="tag" type="primary">{{attr.value}}</van-tag>
            <van-tag class="tag" type="warning" v-if="item.type === 'live'">直播商品</van-tag>
        </template>

        <template #desc v-else>
            <van-tag class="tag" type="danger">无规格数据</van-tag>
            <van-tag class="tag" type="warning" v-if="item.type === 'live'">直播商品</van-tag>
        </template>

        <template #price>
            <div class="price">单价：￥{{item.price}}</div>
            <div class="price">合计：￥{{item.total}}</div>
        </template>
    </van-card>

    <van-cell title="支付方式" :value="PayActive.text" is-link @click="PayShow = true" />

    <!-- 支付方式的选择器 -->
    <van-popup 
        v-model:show="PayShow"
        position="bottom"
        round
    >
        <van-picker
            title="选择支付方式"
            :columns="PayList"
            @cancel="PayShow = false"
            @confirm="OnPayConfirm"
        />
    </van-popup>

    <!-- 优惠券单元格 -->
    <van-coupon-cell
        :coupons="CouponList"
        :chosen-coupon="CouponActive"
        @click="CouponShow = true"
    />

    <!-- 优惠券列表 -->
    <van-popup
        v-model:show="CouponShow"
        round
        position="bottom"
        style="height: 90%; padding-top: 4px;"
    >
        <van-coupon-list
            :coupons="CouponList"
            :disabled-coupons="NotCouponList"
            :chosen-coupon="CouponActive"
            :exchange-button-disabled="true"
            :show-exchange-bar="false"
            @change="OnCouponChange"
        />
    </van-popup>

    <!--订单备注 -->
    <van-field 
        v-model="remark"
        rows="2"
        autosize
        label="订单备注"
        type="textarea"
        maxlength="120"
        placeholder="请输入订单备注"
        show-word-limit
    />

    <!-- 添加收货地址 -->
    <van-popup 
        v-model:show="AddressShow"
        position="bottom"
        round
    >
        <van-address-edit 
            show-set-default
            :area-list="areaList"
            :area-columns-placeholder="['请选择', '请选择', '请选择']"
            :address-info="AddressInfo"
            @save="OnAddressAdd"
        />
    </van-popup>


    <!-- 提交动作栏 -->
    <van-submit-bar text-align="left" :price="total" button-text="确认支付" @submit="OnSubmit" />
</template>

<script setup>
 // 引入地区数据
import { areaList } from '@vant/area-data';
const { proxy } = getCurrentInstance();

const business = proxy.$business;
const address = ref({});
const CartList = ref([]);
const cartids = ref(proxy.$route.query.cartids ?? 0);

// 订单备注
const remark = ref('');

// 支付方式
const PayShow = ref(false);
const PayActive = ref({text: '余额支付', value: 'money'});
const PayList = ref([
    {text: '余额支付', value: 'money'},
    {text: '微信支付', value: 'wx'},
    {text: '支付宝支付', value: 'zfb'},
]);

// 优惠券
const CouponList = ref([]);
const NotCouponList = ref([]);
const CouponShow = ref(false);
const CouponActive = ref(-1);

const AddressInfo = ref({});
const AddressShow = ref(false);

onBeforeMount(() =>
{
    GetAddressData();
    GetCartData();
    GetCouponData();
});

const GetAddressData = async () =>
{
    // 获取缓存用户选择的收货地址
    const cached = Object.getOwnPropertyNames(proxy.$address.value).length > 0 ? proxy.$address.value : null;

    if(cached)
    {
        address.value = cached;

        return false;
    }

    const params = {
        busid:business.value.id
    }

    const result = await proxy.$http.post({
        url:'/cart/address',
        params
    });

    if(result.code === 1)
    {
        address.value = {
            id:result.data.id,
            name:result.data.consignee,
            tel:result.data.mobile,
            region_text:result.data.region_text + result.data.address
        }
    }
}

const GetCartData = async () =>
{
    const cached = proxy.$cart.value.length > 0 ? proxy.$cart.value : [];

    // 如果缓存里有商品的数据就拿缓存数据渲染页面
    if(cached.length > 0 && !cartids.value)
    {
        CartList.value = cached;

        return false;
    }

    const params = {
        cartids:cartids.value,
        busid:business.value.id
    }

    const result = await proxy.$http.post({
        url:'/cart/confirm',
        params
    });

    if(result.code === 1)
    {
        CartList.value = result.data;

        // 把商品规格转换对象
        CartList.value.map(item => item.attrs = JSON.parse(item.attrs));
    }else{
        proxy.$fail(result.msg,() => proxy.$router.back());
    }
}

const GetCouponData = async () =>
{
    const params = {
        busid:business.value.id
    }

    const result = await proxy.$http.post({
        url:'/cart/coupon',
        params
    });

    if(result.code === 1)
    {
        for(let item of result.data.CouponList)
        {
            CouponList.value.push({
                id:item.id,// 领取优惠券记录id
                name:item.coupon.title,// 优惠券名称
                startAt:item.coupon.createtime,// 优惠券开始时间
                endAt:item.coupon.endtime,// 优惠券结束时间
                rate: item.coupon.rate,// 折扣率
                valueDesc: `${item.coupon.rate*100}`,// 折扣券优惠金额文案
                unitDesc: '折',// 单位文案
                condition:item.coupon.status_text,// 满减条件
            })
        }

        for(let item of result.data.NotCouponList)
        {
            NotCouponList.value.push({
                id:item.id,// 领取优惠券记录id
                name:item.coupon.title,// 优惠券名称
                startAt:item.coupon.createtime,// 优惠券开始时间
                endAt:item.coupon.endtime,// 优惠券结束时间
                rate: item.coupon.rate,// 折扣率
                valueDesc: `${item.coupon.rate*100}`,// 折扣券优惠金额文案
                unitDesc: '折',// 单位文案
                condition:item.coupon.status_text,// 满减条件
            })
        }
    }
}

const OnSubmit = async () =>
{
    // 确认订单页面是立即购买和购物车购买
    if(proxy.$cart.value.length === 0 && cartids.value)
    {
        // 购物车购买的
        // 组装提交的数据
        const params = {
            busid:business.value.id,
            addrid:address.value.id,
            cartids:cartids.value,
            pay:PayActive.value.value,
            remark:remark.value
        }

        // 用户是否选择了优惠券 索引值
        if(CouponActive.value !== -1)
        {
            params.couponid = CouponList.value[CouponActive.value].id;
        }

        // 发起请求
        const result = await proxy.$http.post({
            url:'/order/cart',// 购物车购买的接口
            params
        });

        if(result.code === 1)
        {
            proxy.$success(result.msg,() =>
            {
                proxy.$router.push({
                    path:result.url,
                    query:{
                        orderid:result.data.orderid
                    },
                    replace:true// 当前历史记录删除
                })
            });
        }else{
            proxy.$fail(result.msg);
        }

    }else{
        // 立即购买的
    }

    

    

}

const OnAddressAdd = () =>
{

}

// 选择支付方式
const OnPayConfirm = ({selectedOptions}) =>
{
    const values = selectedOptions[0];

    PayActive.value = values;

    PayShow.value = false;
}

// 选择优惠券
const OnCouponChange = (index) =>
{
    // 选中的索引
    CouponActive.value = index;

    CouponShow.value = false;

    if(index !== -1)
    {
        // 选中的优惠券
        let coupon = CouponList.value[index];

        // 定义优惠后总价
        let total = 0;

        // 计算商品的总价
        CartList.value.map(item => total += parseFloat(item.total));

        // 保留两位小数点
        total = total.toFixed(2);

        // 折扣率
        let rate = coupon.rate ? coupon.rate : 1;

        // 优惠后的总价
        let RatePrice = (parseFloat(total) * parseFloat(rate)).toFixed(2);

        let CouponPrice = (parseFloat(total) - parseFloat(RatePrice)).toFixed(2);
        
        CouponList.value[index].value = parseFloat(CouponPrice) * 100;
    }
}

// 跳转收货地址列表选择收货地址
const OnAddressSelect = () =>
{
    proxy.$router.push({
        path:'/address',
        query:{
            action:'confirm'
        }
    });
}

// 订单总价
const total = computed(() =>
{
    let total = 0;

    CartList.value.map((item) => total += parseFloat(item.total));

    if(CouponActive.value !== -1)
    {
        let rate = CouponList.value[CouponActive.value].rate ?? 1;

        total = (total * rate).toFixed(2);
    }

    return total * 100;
})
</script>

<style scoped>
.van-card{
    background-color:#fff;
}

:deep(.van-card__bottom){
    position: relative;
}

:deep(.van-card__num){
    position: absolute;
    bottom: 0px;
    right: 5px;
}

.title{
    font-size:14px;
    font-weight: bold;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    margin-bottom: 5px;
}

.tag{
    margin-right:5px;
}

.price{
    font-size:12px;
    font-weight: bold;
}

/* 姓名只一行显示，超出隐藏 */
:deep(.van-contact-card__title) div:first-child{
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}
</style>